Material moving mechanism



Jan. 27, 1948.

S. S. POKORNY MATERIAL MOVING MECHANISM Filed Nov. 9, 1945 3 Sheets-$heet l INVENTDR Jan. 27, 1948. s. s. POKORNY MATERIAL MOVING MECHANISM Filed Nov. 9, 1945 3 Sheets-Sheet 2 INVENTOR own Jan. 27, 1948. s. s. POKORNY MATERIAL MOVING MECHANISM :s Sheets-Sheet 3 Filed Nov. 9, 1945 TTDRNEYB INVENTOR Patented Jan. 27, 1948 MATERIAL MOVING MECHANISM Stephen S. Pokorny, Rutland, Iowa, assignor of one-half to Herman Luebbers, Fort Dodge,

Iowa

Application November 9, 1945, Serial No. 627,600

Claims. (01. 214-140) 1 The present invention relates to the material handling and moving art and has particular reference to that portion thereof which includes mechanism which may be attached to and removed from any one of several difierent makes of tractors.

It is an object of the invention to provide a mechanism for attachment to a tractor whereby the motion of the power-take-ofi-shaft of the tractor may be applied for raising and transporting loads of material, scooped up during forward movement of the tractor, more efiiciently, for several difierent purposes, than heretofore.

Another object of the invention is to provide a mechanism for the above stated purposes which elevates material higher and more rapidly than heretofore.

A further object of the invention is to provide a cable winding mechanism and tackle which provides more leverage, in a novel and useful manner, at the start of a load-raising operation than heretofore.

A particular object of the invention is to provide a mechanism for the above stated purposes, the parts of which, when assembled in combination with a tractor an in a normal position, do not extend above the top of the engine or any portion of the said tractor, whereby the vehicle and the new mechanism, while attached thereto, may be driven through comparatively low doorway openings of sheds, barns and the like and without a removal of the new mechanism from said tractor.

Other and further objects and advantages of the invention will beunderstood from the following detailed description thereof.

In the drawings: I

Figure 1 is a side view of the new mechanism attached in an operative position to a tractor, the latter being represented by dotted lines, the said mechanism being in a lowered scooping position and also illustrating the said mechanism in a raised position by means of dotted lines.

Figure 2 is a top plan view of the mechanism shown in Figure l, certain portions thereof being shown in section, the view being taken substantially on line 2-2 of Figure 1.

Figure 3 is a front elevation of the new device shown in Figure 1.

Referring to the drawings for a more particular lines throughout the several views since said tractor may be of any one of several conventional types and therefore believed not to require any particular description or illustration herein.

The ends i3 of the rails It and ii are pivotally mounted on pivot pins, as at it, having their ends bifurcated in a manner whereby the forks at the ends of the rails are disposed at each side of c-shaped supports it and it respectively.

As best shown in Figure 1, the supports 05 and I6 are provided with footings which are secured by any suitable means such as bolts, welding or the like, not shown, to the rear axle housing ll of the tractor l2, and it willbe understood that, if

desired, the rearwardly disposed ends it of the rails ill and ii may be pivotally attached respectively to the rear axle housing ll of the tractor by any suitable means for vertical swinging movements.

The other ends of the rails, indicated at it and i9 respectively, each extends, as best shown in Figures 1 and 2, forwardly of the front steering wheels 2d of the tractor, being secured together by means of a cross-bar 26, the latter having its ends respectively secured to the rails.

As best shown in Figures 1 and 2, oppositely disposed hanger-brackets or trunnion-plates 22 and 23 are respectively secured to opposite sides of the frame of the tractor i2. Any suitable means is employed for securing the hangerbrackets to the frame of the tractor and preferabl bolts, not shown, are utilized, whereby said hanger-brackets may be readily attached to and removed from the said frame and at the time the pivot pins it are removed for detaching the mechanism'of the present invention from the tractor i2.

A jack-shaft 2% is journaled through said hanger-brackets or trunnion-plates, as best shown in Figure 2. The shaft 2t extends outwardl beyond each hanger-bracket for purposes later described.

Between the ends of the jack-shaft 2d and the hanger-brackets, like hubs 25 and 2d are each welded or otherwise suitably secured rigidly to the shaft 2t. As shown in Figure 1, from each hub, two spokes 217 and 2e are radially disposed and arcuate members 2e are secured to the outer endsof the spokes 2i and to the spokes 28 adjacent the outer or forward ends of the spokes 2d. The forward ends3ll extend beyond the adjacent ends of the arcuate members 29 and at the forward ends of the portions tit es best shown in Figure 2, a pipe-bar at is provided which connects said portions 39 together. Stub axles t2 ing a pivotal mounting for flanged rollers 33.

The flanges of the rollers are respectively disposed at opposite sides of the rails l and II and underneath said rails for raising the rails at times when the spokes 23 are swung vertically upward- 1y as later described, said flanges prevent the rails from sliding of! of theirrespective rollers. The arcuate members 29 have end portions 34 which, as best shown in Figure 1, are disposed rearwardly of the spokes 21. As best shown in Figure 2. the arcuate members 29 are each provided with oppositely disposed flanges 35 which are spaced apart to provide channels 35 between said pairs of flanges. As shown in Figure 1, the rearwardly disposed ends of the arcuate members 29, together with their spokes 28, provide an outline of a sector configuration, said sectors being generally indicated at 31. The spokes 21 and 28 being radially disposed from the hubs 25 and 26 respectively constitute radii and since said hubs are locked to the jack-shaft 24, it will be seen that said sectors are arranged to swing in unison at times when the jack-shaft 24 rotates in its trunnion-plates.

A sheave-block 38 is disposed closely adjacent to the rear ends of the sectors 31, each of said blocks being provided with a pivotally mounted sheave pulley wheel 39. Ends of cables 40 are secured respectively to the blocks 38 and said cables are disposed in the channels 36 of the sectors. The forward ends of the cables 40 are dead-ended as at 4|, as best shown in Figure l, to the forward ends of the sectors and adjacent the portions 30 of the spokes 28,

Flexible strands 42 are reeved respectively over the sheave-wheels 39, having ends 43 which are secured to the rear ends of the tractor and preferably, as best shown in Figure 1, secured to the c-shaped supports l5. The other ends of the flexible strands 42 are indicated at 44, being respectively secured to the spools 45 and having portions 46 which are wound about said spools.

A spool-shaft 41 is transversely disposed with respect to the tractor and rearwardly of the pow- F er-take-ofi-shaft 48 of the tractor.

The spool-shaft 41 is mounted in trunnionplates 49 and the latter are secured to a platform 50.

The platform 50 is secured to the step of the tractor by any suitable means such as the studbolts 52 in a manner whereby the spool-shaft 41 is 'revolvably mounted for unitary rotary movements with respect to the spools 45 since said spools are keyed or otherwise suitably locked to the shaft 41.

A beveled pinion 53 is secured by any suitable means to the power-take-ofi-shaft 48 of the tractor I 2 and, during use, the teeth of the pinion 53 are in mesh, at times, with the teeth of a driven pinion 54. The pinion 54 is splined or otherwise suitably locked to the spool-shaft 41 and the latter is transversely slidable in its bearings for causing the teeth of the pinion 54 to engage with the teeth of the beveled pinion 53'at desired times.

A lever 55 is provided, having a bifurcated lower end, the forks of which are pivotally attached by means of pivot pins 56' respectively to upstanding cars 51. The lower ends of the ears 51 are welded or otherwise suitably secured to the platform 50.

'A sleeve 58 is slidably disposed on 'the spoolshaft 41 and on a key or spline 59. The latter is locked to the spool-shaft 41, whereby at times aeaaoee 4 when the shaft 41 rotates. the sleeve .53 also rotates, while at the same time, the sleeve 58 may be moved longitudinally with respect to the spoolshaft.

The sleeve 58 is provided with an annular keri' I 80 and the control-pins 5| extend into said kerl,

said pins being secured to the forked ends respectively of the lever 55.

As thus described, it will be seen that at times when the lever 55 is moved in the direction of the arrow 62, the teeth of the pinions 53 and 54 are caused to engage for causing the power-take-oilshaft 48 to rotate the spools or winding drums 45; It will also be seen that at times when the lever 55 is moved in a direction opposite with respect to the arrow 62, the pinions 53 and 54 be-, come disengaged and that a further movement in the said direction of the spool-shaft 41 will cause the cone E3 to be simultaneously moved in a direction opposite with respect to the arrow 62, since said cone 63 is rigidly secured to the shaft 41 and axially about said shaft. A sufflcient movement of the cone 63 causes it to disengage with a face-plate 64, The face-plate is provided with a bore, the wall of which is axially disposed about theshaft 41, said wall being beveled or tapered complemental to the shape or contour of the cone 63, whereby at the time when the cone rigidly engages the face-plate 64, a braking action is provided for stopping a rotationof the spool-shaft 41 and at a time when the pinions 53 and 54 are disengaged; The lower portion of the face-plate B4 is welded or otherwise suitably secured to the platform 50.

.A second lever 65 is represented in Figur 2 by means of dotted lines and it will be understood that the lever 65 is an initial part of the tractor i2 and so arranged that at the time when th lever 65 is moved in one direction, the transmission gears of the tractor are caused to drive the power-take-off-shaft 48 of said tractor and at a time when said transmission gears are driven by the crankshaft of the engine and the latteris operating.

During operation, the lever 55 is moved in the direction of the arrow 62 to cause an engagement of the pinions 53 and 54, whereupon the lever 65 of the tractor is manipulated for causing the power-take-oiT-shaft to be rotated for correspondingly rotating the spools 45.

At th time when the spools 45 are rotated in one direction, adjacent portions of the flexible strands 42 are wound about the spools for drawing the sheave-blocks towards the rear end of the tractor and for swinging the sectors 35 correspondingly and from the full line position of the latter, as shown in Figure 1, to the dotted line position as shown in said figure.

At the time the radial spokes 28 are moved from their lower full line position, as shown in Figure 1, to a vertical position, as shown by dotted lines in said figure, the rails l0 and H are moved upwardly, swinging on their pivot pins l4, to an angle which is approximately forty-five degrees with respect to a horizontal position and with respect to the surface 66 of the ground upon which the wheels of th tractor are supported.

At times when the flexible strands are further wound about their respective spools 45. the spokes 28 are further moved toward the rear end of the tractor and to the dotted line position thereof, indicated at 28' in Figure 1, for further elevating the forward ends of the rails Ill and H.

At times when it is desired to lower said rails the upper end of the lever 55 is moved towards enemas ,the face-plate 66 for causing a disengagement of the pinions 53 and 54, whereupon the forward ends of the rails I and H become lowered by operation of gravity and a downward movement of said rails may be checked or. controlled by causing the cone-clutch 6| to cooperate with the face-plate 34 for said purpose.

Detents or stops 6'! are provided having forwardly disposed end portion 68 which are secured to the underneath side of the rails l0 and M respectively. At times when the rails l0 and ii are lowered to the position shown in Figure 1, the flanged rollers 33 do not strike said detents. Assuming that the mechanism is operating upon uneven ground and that there is a trench or the like in front of the steering wheels 20 of the tractor and that the forward ends of the rails l0 and II become lowered below the surface of the soil and into said trench, furrow or the like, then in that event, the detent 61 prevents too great a forward movement of the rollers 33 with respect to their respective rails, whereby the rollers 33 are always disposed operatively and in engagement with the underneath sides of their respective rails for raising said rails as above described.

Between the forward ends of the rails I0 and H, a scoop, generally indicated at 69, is provided. The scoop has a rearward wall 10 and a bottom II. If desired, tines 12 may be employed in conjunction with the scoop, being secured to' the bottom 1|.

The scoop further includes oppositely disposed side walls 13. Stub axles M are disposed through the walls 13 respectively and provided with nuts 15. The axles 14 extend through the forward ends of the rails l0 and II respectively and, as thus described, it will be understood that at times when the nuts 75 are turned tightly and sufficiently against the side wall 13 of the scoop, the latter becomes locked with respect to the rails as is essential or advantageous for certain types of work such as elevating bales of hay upwardly for entrance through the door of and storage in a loft, since for this purpose, the scoop 69 need not b swingable with respect to the rails.

For other types of work, the scoop 69 is disposed swingable with respect to said rails to and i l or their respective extensions l0 and II by loosening the nuts 15 and, at this time, an arrangement of levers, reach-rods and links, not shown, is employed for holding the scoop in different positions with respect to the rails for other types of work and, since the scoop 69 may be employed either with or without looking it to the rails I 0 and II, no illustration or particular description of the control links and levers for the scoop is believed to be needed.

From the foregoing description, it is thought to be obvious that a material moving mechanism constructed in accordance with my invention is particularly well adapted for use by reason of the convenience and facility with which it may -be assembled and operated, and it will also be tion of the several parts herein shown in carry-" ing out my invention in practice, except as claimed.

I claim:

1. A material moving mechanism comprising a be rot:ted by the engine of the tractor; a tr m nion plate secured at each side of and to the disposed forwardly of the tractor and said sectors; a scoop disposed between said forward ends of the arms; detents secured to the arms adjacent said forward ends; a cable disposed in each channel, endsof said cables being secured to the forward ends of said sectors; two sheave-blocks, the other ends of said' cables being attached to said blocks respectively; a flexible strand reeved over the sheave of each block having ends secured to the rear end of said tractor; a spoolshaft rotatably disposed transversely at the rear end of said tractor and having a spool at each of its ends; the other ends of said flexible strands being respectively secured to a spool; a. roller pivotally attached to the forward end of each sector; said rollers being arranged to abut said detents for preventing said arms from becoming lowered unduly, said rollers being disposed against said arms for elevating the forward ends thereof at times when said sectors are swung; and means for causing the said power-take-ofi-shaft of the tractor to rotate said spool-shaft for causing said s oop to become elevated. i

2. In a material moving mechanism, a tractor having a power-take-ofi-shaft arranged to be rotated by the engine of the tractor, an arm disposed at each side of said tractor having ends pivotally connected to the rear end of said tractor for vertical swinging movements, theother ends of said arms normally being disposedforwardly of "said tractor; a scoop disposed between said forof said sectors each being provided with a channel; a roller pivotally secured adjacent to one end of the are of each sector, said rollers being disposed in engagement with said arms forelevating said scoop at times when said sectors are swung; 'a sheave-block for each sector, said blocks being disposed at the opposite ends of the arcs of said sectors with respect to the rollers thereof; a cable disposed in each channel; said cables having ends secured to said sectors adjacent the rollersof the latter and opposite ends attached to said blocks respectively; a flexible strand for each block, said strands being reeved over said sheaves and having ends attached to the rear end of said tractorand other ends; and means arranged to be actuated by said power-take-ofishaft of said tractor having a connection with said other ends of said strands for causing said sectors to swing responsive to an actuation of said means. v

3. In a material moving mechanism as claimed in claim 2 which is so constructed and the parts thereof are so cooperatively arranged with respect to each other that none of said parts are disposed above the tractor at the time the arms thereof are disposed in approximate parallelism tractor having a power take-ofi shaft arranged t with the frame of said tractor, for permitting the spondingly.

aesaooa tractor to move through a doorway opening having a head iamb no higher, with respect to the ground, than said tractor.

4. In a material moving mechanism for a tractor: an am having an end adapted to be pivotally connected to the rear end of said tractor and an end disposed forwardly of said tractor when so connected; a sector adapted to be pivotally connected, adjacent the junction of its radii, to' the forward end of said tractor for vertical swinging movement, the arcuate edge or said sector bein provided with a channel; a cable dead-ended to one end of said edge and disposed in said channel; a sheave-block attachedto the other end of said cable and disposed at the other end of said arc; a flexible strand reeved over the sheave of said block; and means for causing the engine of said tractor to move said strand tor swinging said sector toward the rear end of said tractor,

said sector being provided with a roller pivotally 20 attached thereto i'or a'rolilng engagement with said arm for causing the latter to swing corre-,

5. In a material moving mechanism for a tractor; an arm having an end adapted to be pivotaily connected to the rear end of said tractor' and an end disposed forwardly of said tractor when so connected; a sectorv adapted to be pivotally connected, adjacent the junction of its radii. to the forward end of said tractor for vertical swinging, movement, the arcuate edge of said sectorbe- REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 206,023 Johnson July 16, 1878 1,360,997 Armstrong Dec. 7, 1920 2,286,947 Bankson June 16, 1942 2,313,534 Gledhill Mar. 9, 1943 2,322,472 Sandvig June 22, 1942 2,371,273 Walker Mar. 13, 1945 2,402,064 Markel June 11, 1946 2,415,892 Koch] et a1. -2. Feb. 18, 1947 

